Change some global variables to have internal linkage (#4252)

* Change some global variables to have internal linkage

* Update rcore.c

* Update rcore.c

src/rcore.c

@@ -367,9 +367,9 @@ static int screenshotCounter = 0;    // Screenshots counter
 #endif
 
 #if defined(SUPPORT_GIF_RECORDING)
-unsigned int gifFrameCounter = 0;    // GIF frames counter
+static unsigned int gifFrameCounter = 0;    // GIF frames counter
-bool gifRecording = false;           // GIF recording state
+static bool gifRecording = false;           // GIF recording state
-MsfGifState gifState = { 0 };        // MSGIF context state
+static MsfGifState gifState = { 0 };        // MSGIF context state
 #endif
 
 #if defined(SUPPORT_AUTOMATION_EVENTS)

src/rshapes.c

@@ -79,8 +79,8 @@
 //----------------------------------------------------------------------------------
 // Global Variables Definition
 //----------------------------------------------------------------------------------
-Texture2D texShapes = { 1, 1, 1, 1, 7 };                // Texture used on shapes drawing (white pixel loaded by rlgl)
+static Texture2D texShapes = { 1, 1, 1, 1, 7 };                // Texture used on shapes drawing (white pixel loaded by rlgl)
-Rectangle texShapesRec = { 0.0f, 0.0f, 1.0f, 1.0f };    // Texture source rectangle used on shapes drawing
+static Rectangle texShapesRec = { 0.0f, 0.0f, 1.0f, 1.0f };    // Texture source rectangle used on shapes drawing
 
 //----------------------------------------------------------------------------------
 // Module specific Functions Declaration