Fixed missing return in some c tests

TestScripts/C Tests/CtrlTests.h

@@ -74,6 +74,7 @@ int basicCTRLTest(char** drefs, int ac)
 	{
 		return -30000 + result;
 	}
+    return 0;
 }
 
 int testCTRL_Player()
@@ -143,5 +144,6 @@ int testCTRL_Speedbrakes()
 	{
 		return -30000 + result;
 	}
+    return 0;
 }
 #endif

TestScripts/C Tests/PosiTests.h

@@ -83,6 +83,7 @@ int basicPOSITest(char** drefs, int ac)
 	{
 		return -20000 + result;
 	}
+    return 0;
 }
 
 int testPOSI_Player()

TestScripts/C Tests/SimuTests.h

@@ -31,6 +31,7 @@ int doSIMUTest(int value, float expected)
 			return -100 - i;
 		}
 	}
+    return 0;
 }
 
 int testSIMU_Basic()