Revert pyqt3TQtSignal to pyqt3QtSignal

It allows to retain compatibility with the original SIP4

sipgen/gencode.c

@@ -6171,7 +6171,7 @@ static void generateEmitters(classDef *cd, FILE *fp)
 
                     prcode(fp,
 "\n"
-"static pyqt3TQtSignal signals_%C[] = {\n"
+"static pyqt3QtSignal signals_%C[] = {\n"
                         ,classFTQCName(cd));
 
                     noIntro = FALSE;

siplib/sip.h

@@ -1505,13 +1505,13 @@ typedef int (*pyqt3EmitFunc)(sipSimpleWrapper *, PyObject *);
 /*
  * Maps the name of a TQt signal to a wrapper function to emit it.
  */
-typedef struct _pyqt3TQtSignal {
+typedef struct _pyqt3QtSignal {
     /* The signal name. */
     const char *st_name;
 
     /* The emitter function. */
     pyqt3EmitFunc st_emitfunc;
-} pyqt3TQtSignal;
+} pyqt3QtSignal;
 
 
 /*
@@ -1525,7 +1525,7 @@ typedef struct _pyqt3ClassTypeDef {
     sipClassTypeDef super;
 
     /* The emit table for TQt signals. */
-    pyqt3TQtSignal *qt3_emit;
+    pyqt3QtSignal *qt3_emit;
 } pyqt3ClassTypeDef;