getopt() returns int

See getopt(3): returns int, so store it in an int variable.
I went through all occurrences, project-wide. All return values of
getopt() should be stored in ints now.

openair1/SIMULATION/LTE_PHY/framegen.c

@@ -461,9 +461,6 @@ void lte_param_init(  unsigned char transmission_mode,
 
 int main(int argc, char **argv)
 {
-
-  char c;
-
   int i,l,aa,aarx,sector;
 
   unsigned char pbch_pdu[6];
@@ -504,6 +501,7 @@ int main(int argc, char **argv)
   logInit();
   g_log->log_component[PHY].level = LOG_DEBUG;
 
+  int c;
   while ((c = getopt (argc, argv, "hpFb:n:m:x:N:R:")) != -1) {
     switch (c) {
     case 'n':

openair1/SIMULATION/LTE_PHY/pbchsim.c

@@ -57,7 +57,6 @@ int32_t dummy3[2048*14];
 
 
 int main(int argc, char **argv) {
-  char c;
   int i,l,aa;
   double sigma2, sigma2_dB=0,SNR,snr0=-2.0,snr1;
   uint8_t snr1set=0;
@@ -104,6 +103,7 @@ int main(int argc, char **argv) {
   logInit();
   number_of_cards = 1;
 
+  int c;
   while ((c = getopt (argc, argv, "f:hA:pf:g:i:j:n:s:S:t:x:y:z:N:F:GR:O:dP:")) != -1) {
     switch (c) {
       case 'f':

openair1/SIMULATION/LTE_PHY/pdcchsim.c

@@ -374,7 +374,6 @@ DCI_PDU *get_dci(LTE_DL_FRAME_PARMS *lte_frame_parms,uint8_t log2L, uint8_t log2
 extern int QPSK[4],QPSK2[4];
 
 int main(int argc, char **argv) {
-  char c;
   int i,l,aa;
   double sigma2, sigma2_dB=0,SNR,snr0=-2.0,snr1;
   int **txdata;
@@ -425,6 +424,7 @@ int main(int argc, char **argv) {
   cpuf = get_cpu_freq_GHz();
   logInit();
 
+  int c;
   while ((c = getopt (argc, argv, "hapFg:R:c:n:s:x:y:z:L:M:N:I:f:i:S:P:Y")) != -1) {
     switch (c) {
       case 'a':

openair1/SIMULATION/LTE_PHY/prachsim.c

@@ -45,7 +45,6 @@ double cpuf;
 void dump_prach_config(LTE_DL_FRAME_PARMS *frame_parms,uint8_t subframe);
 
 int main(int argc, char **argv) {
-  char c;
   int i,aa,aarx;
   double sigma2, sigma2_dB=0,SNR,snr0=-2.0,snr1=0.0,ue_speed0=0.0,ue_speed1=0.0;
   uint8_t snr1set=0;
@@ -85,6 +84,7 @@ int main(int argc, char **argv) {
   logInit();
   number_of_cards = 1;
 
+  int c;
   while ((c = getopt (argc, argv, "hHaA:Cr:p:g:n:s:S:t:x:y:v:V:z:N:F:d:Z:L:R:E")) != -1) {
     switch (c) {
       case 'a':

openair1/SIMULATION/LTE_PHY/pucchsim.c

@@ -45,7 +45,6 @@ PHY_VARS_UE *UE;
 double cpuf;
 
 int main(int argc, char **argv) {
-  char c;
   int i,l,aa;
   double sigma2, sigma2_dB=0,SNR,snr0=-2.0,snr1=0.0;
   uint8_t snr1set=0;
@@ -88,6 +87,7 @@ int main(int argc, char **argv) {
   number_of_cards = 1;
   cpuf = get_cpu_freq_GHz();
 
+  int c;
   while ((c = getopt (argc, argv, "har:pf:g:n:s:S:x:y:z:N:F:T:R:")) != -1) {
     switch (c) {
       case 'a':

openair1/SIMULATION/LTE_PHY/scansim.c

@@ -57,7 +57,6 @@ mod_sym_t dummy3[2048*14];
 
 
 int main(int argc, char **argv) {
-  char c;
   int i,l,aa;
   double sigma2, sigma2_dB=0,SNR,snr0=-2.0,snr1;
   uint8_t snr1set=0;
@@ -103,6 +102,7 @@ int main(int argc, char **argv) {
   number_of_cards = 1;
   openair_daq_vars.rx_rf_mode = 1;
 
+  int c;
   while ((c = getopt (argc, argv, "f:hpf:g:n:s:S:t:x:y:z:N:F:GdP:")) != -1) {
     switch (c) {
       case 'f':

openair1/SIMULATION/LTE_PHY/syncsim.c

@@ -304,7 +304,6 @@ void lte_param_init(unsigned char N_tx, unsigned char N_rx,unsigned char transmi
 
 
 int main(int argc, char **argv) {
-  char c;
   int i,iout,l,aa,aarx;
   double sigma2, sigma2_dB=0,SNR,snr0=10.0,snr1=11.0;
   uint8_t snr1set=0;
@@ -377,6 +376,7 @@ int main(int argc, char **argv) {
     rxdata[0] = (int *)malloc16(FRAME_LENGTH_BYTES);
     rxdata[1] = (int *)malloc16(FRAME_LENGTH_BYTES);
   */
+  int c;
   while ((c = getopt (argc, argv, "aehc:f:g:i:j:n:r:s:t:x:y:z:A:F:N:O:R:S:ZYDT:C:G:dB:U:u")) != -1) {
     switch (c) {
       case 'a':