fix unnecessary warnings in some files (#5152)

examples/core/core_random_sequence.c

@@ -175,7 +175,6 @@ static void DrawTextCenterKeyHelp(const char *key, const char *text, int posX, i
     int spaceSize = MeasureText(" ", fontSize);
     int pressSize = MeasureText("Press", fontSize);
     int keySize = MeasureText(key, fontSize);
-    int textSize = MeasureText(text, fontSize);
     int textSizeCurrent = 0;
 
     DrawText("Press", posX, posY, fontSize, color);

examples/models/models_mesh_picking.c

@@ -18,6 +18,7 @@
 #include "raylib.h"
 #include "raymath.h"
 
+#undef FLT_MAX
 #define FLT_MAX     340282346638528859811704183484516925440.0f     // Maximum value of a float, from bit pattern 01111111011111111111111111111111
 
 //------------------------------------------------------------------------------------

examples/models/models_point_rendering.c

@@ -161,9 +161,9 @@ static Mesh GenMeshPoints(int numPoints)
     // https://en.wikipedia.org/wiki/Spherical_coordinate_system
     for (int i = 0; i < numPoints; i++)
     {
-        float theta = ((float)PI*rand())/RAND_MAX;
-        float phi = (2.0f*PI*rand())/RAND_MAX;
-        float r = (10.0f*rand())/RAND_MAX;
+        float theta = ((float)PI*rand())/((float)RAND_MAX);
+        float phi = (2.0f*PI*rand())/((float)RAND_MAX);
+        float r = (10.0f*rand())/((float)RAND_MAX);
 
         mesh.vertices[i*3 + 0] = r*sinf(theta)*cosf(phi);
         mesh.vertices[i*3 + 1] = r*sinf(theta)*sinf(phi);

src/rlgl.h

@@ -3243,6 +3243,7 @@ unsigned int rlLoadTexture(const void *data, int width, int height, int format,
     int mipWidth = width;
     int mipHeight = height;
     int mipOffset = 0;          // Mipmap data offset, only used for tracelog
+    (void)mipOffset;            // Used to avoid gcc warnings about unused variable
 
     // NOTE: Added pointer math separately from function to avoid UBSAN complaining
     unsigned char *dataPtr = NULL;